Как я получаю IP-адрес сервера/веб-сайта в asp.net?

 // Open the Modal
function openModal(id) {
  document.getElementById(id).style.display = "block";
}

// Close the Modal
function closeModal(id) {
  document.getElementById(id).style.display = "none";
}

var slideIndex = 1;
showSlides('myModal', slideIndex);
showSlides('myModal2', slideIndex);

// Next/previous controls
function plusSlides(id, n) {
  showSlides(id, slideIndex += n);
}

// Thumbnail image controls
function currentSlide(id, n) {
  showSlides(id, slideIndex = n);
}

function showSlides(id, n) {
  var i;
  var modalDiv = document.getElementById(id);
  var slides = modalDiv.getElementsByClassName("mySlides");
/*   var dots = modalDiv.getElementsByClassName("demo"); */
  if (n > slides.length) {slideIndex = 1}
  if (n < 1) {slideIndex = slides.length}
  for (i = 0; i < slides.length; i++) {
    slides[i].style.display = "none";
  }
/*   for (i = 0; i < dots.length; i++) {
    dots[i].className = dots[i].className.replace(" active", "");
  } */
  slides[slideIndex-1].style.display = "block";
/*   dots[slideIndex-1].className += " active"; */
}

/*Main list*/
#list ul{width:100%; height:100%; border-radius:0px;  list-style-type:none; margin:5% 0% 0% 0%; overflow:hidden; padding:0% 0% 4% 0%; background:rgba(240,240,240,1);}
#list li{box-shadow:0px 10px 10px 0px rgba(0,0,0,0.2); transition:0.1s; border-radius:0px 0px 10px 10px; border:2px solid black; color:black; background:rgba(255,255,255,1); width:70%; height:auto; display:block; text-decoration:none; font-weight:bold; font-size:0.9vw; margin:0% 0% 5% 0%; overflow:hidden; word-wrap:break-all; word-break:break-word; padding:0% 0% 0% 0%; float:left; text-align:center; line-height:1.2; }

.row > .column {
 Padding:0%; margin:0;
  width:30%; height:auto; float:left;
}

.column img{width:95%; height:auto; margin:0% 0% 0% 0%; float:left;}

.row:after {
  content: "";
  display: table;
  clear: both;
}

/* Create four equal columns that floats next to eachother */
.column {
  float: left;
  width: 25%;
}

/* The Modal (background) */
.modal {
  display: none;
  position: fixed;
  z-index: 1;
  padding-top: 100px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: black;
}

/* Modal Content */
.modal-content {
  position: relative;
  background-color: #fefefe;
  margin: auto;
  padding: 0;
  width: 90%;
  max-width: 1200px;
}

/* The Close Button */
.close {
  color: white;
  position: absolute;
  top: 10px;
  right: 25px;
  font-size: 35px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: #999;
  text-decoration: none;
  cursor: pointer;
}

/* Hide the slides by default */
.mySlides {
  display: none;
}

/* Next & previous buttons */
.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
  color: white;
  font-weight: bold;
  font-size: 20px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
  -webkit-user-select: none;
}

/* Position the "next button" to the right */
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover,
.next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

/* Caption text */
.caption-container {
  text-align: center;
  background-color: black;
  padding: 2px 16px;
  color: white;
}


.active,
.demo:hover {
  opacity: 1;
}

img.hover-shadow {
  transition: 0.3s;
}

.hover-shadow:hover {
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

<div id="list">
<ul>
<li>
 <!-- Images used to open the lightbox -->
<div class="row">
  <div class="column">
    <img src="https://www.w3schools.com/howto/img_nature_wide.jpg" onclick="openModal('myModal');currentSlide('myModal',1)" class="hover-shadow">
  </div>
  Some text
</div>

<!-- The Modal/Lightbox -->
<div id="myModal" class="modal">
  <span class="close cursor" onclick="closeModal('myModal')">&times;</span>
  <div class="modal-content">

    <div class="mySlides">
      <div class="numbertext">1 / 4</div>
      <img src="https://www.w3schools.com/howto/img_nature_wide.jpg" style="width:100%">
    </div>

    <div class="mySlides">
      <div class="numbertext">2 / 4</div>
      <img src="https://www.w3schools.com/howto/img_snow_wide.jpg" style="width:100%">
    </div>

    <div class="mySlides">
      <div class="numbertext">3 / 4</div>
      <img src="https://www.w3schools.com/howto/img_mountains_wide.jpg" style="width:100%">
    </div>

    <div class="mySlides">
      <div class="numbertext">4 / 4</div>
      <img src="https://www.w3schools.com/howto/img_lights_wide.jpg" style="width:100%">
    </div>

    <!-- Next/previous controls -->
    <a class="prev" onclick="plusSlides('myModal',-1)">&#10094;</a>
    <a class="next" onclick="plusSlides('myModal',1)">&#10095;</a>

  </div>
</div> 
</li>

<li>
 <!-- Images used to open the lightbox -->
<div class="row">
  <div class="column">
    <img src="https://www.w3schools.com/howto/img_snow.jpg" onclick="openModal('myModal2');currentSlide('myModal',1)" class="hover-shadow">
  </div>
  Some text
</div>

<!-- The Modal/Lightbox -->
<div id="myModal2" class="modal">
  <span class="close cursor" onclick="closeModal('myModal2')">&times;</span>
  <div class="modal-content">

    <div class="mySlides">
      <div class="numbertext">1 / 4</div>
      <img src="https://www.w3schools.com/howto/img_snow.jpg" style="width:100%">
    </div>

    <div class="mySlides">
      <div class="numbertext">2 / 4</div>
      <img src="https://www.w3schools.com/howto/img_woods_wide.jpg" style="width:100%">
    </div>

    <div class="mySlides">
      <div class="numbertext">3 / 4</div>
      <img src="https://www.w3schools.com/howto/img_5terre_wide.jpg" style="width:100%">
    </div>

    <div class="mySlides">
      <div class="numbertext">4 / 4</div>
      <img src="https://www.w3schools.com/howto/img_mountains_wide.jpg" style="width:100%">
    </div>

    <!-- Next/previous controls -->
    <a class="prev" onclick="plusSlides('myModal2',-1)">&#10094;</a>
    <a class="next" onclick="plusSlides('myModal2',1)">&#10095;</a>



   
  </div>
</div> 
</li>
</ul>
</div>
 
 <script>

</script>